In general:
Commoners will get meat maybe once a week if they are lucky; country people get it a bit more often, since they'll often be able to get a chicken and boil it. More often if they live near a stream or the sea. Then it's fish, fish, fish. And lobster (lobster is not a rare thing; lobster only became a 'delicacy' when the old money of the 20's, looking to enjoy 'the rustic life' hit upon the simple boiled lobster dinner of the fishermen. Before that, lobsters were just poor man's food, often discarded).
Potatoes, onions, leeks, various other veggies, with a soup bone to flavor up the stews. Stew, ladled over coarse bread. Apples. Cheese. Milk. Cream. Oats. Oatmeal. Oatbread. Cracked oats. Oat gumbo, um, no, but you get the picture. On feast days or special holidays: rabbit, maybe mutton. Sometimes the village will slaughter pigs or cattle for a wedding feast or the greater religious holidays. Beer, wine, applejack, cider. Herb tea. Water. Sausages are popular workingman's food in the towns and cities; your typical workman will bring some dough and a cold sausage, then leave it to be heated along with the dough at a local baker. Then if there is a food break, he gets a nice sausage and bun to hold it with.
Nobles eat meat at least twice a week, sometimes more. They have more elaborate meals, with better spices and more expensive ingredients, but a lot of the basic dishes are the same: soups, vegetable dishes, stews. The bread is finer-ground. Better wines. Better, stronger herbal teas.
Adventurers usually eat meat more often than anyone since they can afford it and since they're often away from civilization and anyone who can say 'You can't kill that deer'. They live off the land a lot more, especially if there is a druid in the party. Herb teas. They often have a lot of preserved food; sometimes magically preserved, sometimes not. Travelling in civilized terrain, they'll often be able to get hot meat pies or wrapped cheese/meat rolls from the inns. They also eat out a lot more.