vegetable that it doesn't improve.
These grape tomatoes were starting to get wrinkly and sad. CRISIS. So I cut them all in half, threw in some whole garlic cloves for good measure, tossed everything in olive oil, salt, and pepper, and threw the pan in the oven at a low temperature (325º, maybe?) for about an hour and a half (larger tomatoes would take longer, though).
Out came magic. Crisis averted.