From what I can find, there was a lot of barley, wheat, rye. Meat and fish. Peas, cabbage, apples, pears, grapes, honey, legumes, herbs, cheese.

Recipes turn out to be a lot of bread with cheese, meat or stews, with wine or beer. And also things like pancakes and other baked goods.

Take veel other motoun and smyte it to gobettes. Seeth it in gode broth; cast therto erbes yhewe gode won, and a quantite of oynouns mynced, powdour fort and safroun, and alye it with ayren and verious: but let it not seeth after.

—Curye on Inglysch, IV.18.

Meat, grains, fruit, and veg. Just different ones and less variety.