I know exactly what it would be like as a volunteer as a Tudor re-enactor and have cooked meals for both gentry level people and working class people, without using any tomatoes or potatoes (or forks! They didn't have those either). Working class people didn't just eat mush. Examples I have cooked and eaten for working class include:
Veg stews of all kinds, including things like onions, leeks, all kinds of pulses, carrots, herbs, garlic, all kings of green veg
Bread
Cheese
Occasional meat and fish
Authentic Tudor gentry level food (for well off family, not nobility) that I have cooked and /or eaten:
Veg stews but also meat stews, using chicken, pork, pheasant, rabbit, beef, with all kinds of herbs or spices to flavour
Various dishes of lentils /pulses
Tarts - both sweet and savoury. Quiche type tarts, could include French cheese in them (imported from France).
Gingerbread
Meatballs
Various fish dishes
Pasta in shape of noodles - yes really
Stuffed things - stuffed mushrooms, stuffed eggs
Salads using fresh lettuce and all kinds of other veg
Stewed fruit sweetened with honey. Marzipan.
They ate very well without a single potato or tomato!