Low FODMAP Vegetarian Meal Plan: 7 Days With Grocery List

By the Caullie team · Published July 14, 2026 · Portions aligned to current Monash University guidance (including the June 2026 maple syrup update)

Being vegetarian on the low FODMAP diet is genuinely hard mode. The diet already helps IBS symptoms improve in about 3 out of 4 people who follow it, per the Monash University researchers who created it — but it restricts the legumes, wheat, onion, and garlic that vegetarian cooking leans on. Monash's own guidance warns that a plant-based low FODMAP diet must be carefully planned or it will fall short on protein, iron, zinc, and calcium.

This plan is that careful planning, done for you: 7 days of vegetarian meals for the elimination phase, built entirely from foods with verified low FODMAP serves — firm tofu, eggs, rinsed canned legumes in Monash-sized portions, lactose-free dairy — with per-meal calories and a grocery list that comes to about $75 at Walmart. And one thing up front, straight from Monash: the strict phase is meant to last just 2–6 weeks — it is not a diet for life.

What does "low FODMAP" actually mean?

FODMAPs are a group of short-chain carbohydrates that ferment in the gut and can trigger bloating, pain, and bowel changes in people with IBS — which affects about 12% of people in the United States, per the NIH. The diet that targets them, developed at Monash University, has three phases: a strict low FODMAP phase for 2–6 weeks, a structured reintroduction phase (about 6–8 weeks, testing one FODMAP group at a time), and a personalization phase where you keep eating everything you tolerate and limit only your triggers. A meta-analysis of controlled trials backs up its effect on IBS symptoms. Monash recommends doing it with a registered dietitian — doubly so for vegetarians, since you're stacking restrictions. This plan covers phase one, the strict weeks.

Can you even be vegetarian on the low FODMAP diet?

Yes — the trick is knowing which proteins are safe and at what portion, because the portion is the whole game:

• Eggs — FODMAP-free. FODMAPs are carbohydrates; eggs are protein and fat, and they're on Monash's low FODMAP foods list with no limit.
• Firm tofu, drained — low FODMAP at a generous 170 g (1 cup) serve, because pressing removes the water-soluble FODMAPs. Silken tofu is not — the FODMAPs stay in.
• Canned lentils and chickpeas, rinsed and drained — canning leaches FODMAPs into the brine, so canned legumes are the low FODMAP way in — but only about ¼ cup per meal (roughly 46 g lentils, 42 g chickpeas per the Monash app). This plan treats legumes as a garnish, not the main event.
• Peanut butter — low FODMAP at a 2-tablespoon (32 g, US-tested) serve per the Monash app data.
• Lactose-free milk and hard cheeses — both on Monash's low list; aged cheddar is naturally low in lactose (~40 g serve).
• Tempeh — fermentation lowers FODMAPs; low at 100 g with ~18 g protein. It's the pricier swap option in the table below.

The ~$75 grocery list (Walmart, July 2026)

Store-brand (Great Value) where it exists. Prices are from walmart.com listings checked July 14, 2026 — treat them as estimates; produce prices swing seasonally and by store.

Assumes pantry salt, pepper, and dried herbs (oregano, basil, and chives are low FODMAP-friendly seasonings). Notes: canned lentils can be spotty in stock — a $1.92 bag of dry lentils, cooked and portioned, is the cheaper fallback. Any oats work here: low FODMAP is not a gluten-free diet, so you don't need certified gluten-free oats unless you also have celiac disease. Garlic-infused oil pricing varies a lot ($4–6.50) — the fallback is plain oil plus scallion greens (see below). The peanut butter, oils, rice, oats, and maple syrup carry well into week two.

Batch-cook these on day one (about 75 minutes)

• Lentil-tomato sauce (4 servings): Sauté grated carrot and diced zucchini in a tablespoon of garlic-infused oil, add both cans of diced tomatoes, 1 cup of rinsed canned lentils, oregano, salt, and a splash of water; simmer 20 minutes and stir in scallion greens at the end. Each serving keeps lentils around the ¼-cup Monash serve.
• Roast tofu tray: Press and cube both blocks; toss with oil, salt, and pepper; roast at 425°F for ~30 minutes until golden. Half is tonight's dinner, half goes into fried rice.
• Pot of rice (3 cups dry) and a batch of quinoa (1 cup dry).
• Hard-boil 4 eggs for snacks and egg salad.

Food-safety note: buy garlic-infused oil rather than making it — home-infused garlic oil carries a botulism risk unless it's acidified commercially.

The 7-day plan (~1,600–1,800 calories/day)

Calories are approximate, computed from USDA FoodData Central entries — firm tofu (~245 kcal per 170 g serve), cooked quinoa (~222 kcal/cup), lentils (~58 kcal/¼ cup), canned chickpeas (~57 kcal/¼ cup), cheddar (~115 kcal/oz), 2% milk (~122 kcal/cup, lactose-free is equivalent), plus the rice, egg, banana, and peanut butter entries from our gluten-free dairy-free plan. Targets one moderately active adult — scale to your own goal.

Portion watch-outs: foods Monash has re-tested

Most low FODMAP lists floating around the internet are years out of date — Monash re-tests foods regularly, and serving sizes move. The ones that matter for this plan, current as of July 2026:

Serving sizes come from the Monash FODMAP app via the dietitian sources linked above — the app is the canonical, always-current source and is worth having during elimination and reintroduction.

Easy swaps

How do you cook without onion and garlic?

This is the question that breaks most people, and the answer is chemistry: the FODMAPs in garlic and onion (fructans) are water-soluble but not oil-soluble. As Monash puts it, "fructans are water soluble but not fat soluble" — so a commercially garlic-infused oil delivers the flavor while leaving the fructans behind. That one bottle does most of the heavy lifting in this plan's sauce, stir-fry, and roasted vegetables. For the fresh-onion note, Monash recommends the green tops of spring onions or chives, added near the end of cooking. Buy the infused oil rather than steeping garlic in oil at home — commercial versions are made safely, while DIY garlic-in-oil is a known botulism risk.

How long should I eat this way?

Two to six weeks — then stop restricting and start testing. Monash is emphatic that the elimination phase is "not a diet for life": after symptoms settle, you move to phase two, reintroducing one FODMAP group at a time over roughly 6–8 weeks, then phase three, where you eat everything you tolerate and limit only your proven triggers. This matters extra for vegetarians: the strict phase cuts deep into plant proteins, so staying in it longer than necessary works against your nutrition. Monash recommends running the process — especially reintroduction — with a registered dietitian, and doubly so when you're combining it with a meat-free diet.

Will this actually help my IBS?

The honest odds: Monash's research found IBS symptoms improve in 3 out of 4 people who follow a low FODMAP diet, and a meta-analysis of controlled trials supports the effect — which also means roughly 1 in 4 people don't respond, and for them further restriction isn't the answer. Two cautions worth taking seriously: get an actual IBS diagnosis first (symptoms like these can have other causes a doctor should rule out), and treat this as a diagnostic experiment, not a lifestyle. If a few strict weeks on a plan like this one doesn't move your symptoms, that's genuinely useful information to bring back to your doctor or dietitian.

This article is about meal logistics and cost, not medical care, and is not medical advice. The low FODMAP diet should ideally be undertaken with guidance from a doctor or registered dietitian, particularly the reintroduction phase. FODMAP serving sizes reflect Monash University guidance as of July 2026 via the sources linked above and can change as foods are re-tested — the Monash FODMAP app is the canonical source. Calorie figures are approximate, derived from the USDA FoodData Central entries linked above. Prices are walmart.com listing estimates from July 14, 2026 and will vary by store and season.