Store the whipped ricotta and roasted raspberries in separate airtight glass containers for up to 3 days in the refrigerator. Keep the bread at room temperature in a sealed bag for 2 days. Don't refrigerate assembled toast because the crumb turns damp. You can freeze the roasted berries for 1 month in a flat freezer bag, but don't freeze the whipped ricotta or finished toast. Rewarm plain bread at 375°F for 4 minutes and let it cool for 2 minutes before topping. Bring refrigerated berries to room temperature for 20 minutes, or warm them for 10 seconds. Discard ricotta that smells sour or shows pink discoloration. Throw away berries with fermented bubbles, fuzzy growth or a sharp alcoholic smell. Fresh basil should stay bright green and dry before serving.