During FODMAP elimination phase, I could eat variety. Fruits like bananas, blueberries, cantaloupe, lemon, raspberry, strawberry, tangerines; veggies like green beans, carrots, eggplant, kale, lettuce, potatoes, spinach, tomatoes, zucchini; meats like chicken, turkey, beef, fish,pork, shellfish. I could have eggs, peanut butter, butter, margarine, olive oil, beer, wine, coffee, tea. Seasonings like salt, pepper, parsley, oregano, dill, rosemary, etc.

I know I can handle lactose so I had milk, cheese, etc. Was totally gluten free.

The biggest issue is sweeteners in prepared foods and sauces, salad dressing, etc. Absolutely NO garlic or onion. So I use olive oil and lemon on alot of things to provide flavor. Yes, it is fairly bland and limited in scope.

Hard to eat out or at someone else's home. My friends understand and are very patient with me when I order at restaurants!
I have to be very specific with the waiter about how to prepare the food and what not to include, etc.

Obviously everyone is different and may have other health conditions/GI issues that make this more difficult.

A good resource for Low FODMAP foods is http://www.katescarlata.com/
Also https://www.monashfodmap.com/. Monash Univ in Australia created low FODMAP diet for IBS

Hope this helps!