Step 1

Preheat oven or grill to 375°.

Step 2

Slice tomatoes in half. Toss with olive oil and place on a baking sheet. Add onion. Sprinkle with salt and pepper.

Step 3

Bake at 375 for approximately 20-30 minutes, or until starting to turn brown on top a bit. Check often, and add minced garlic to pan during last 5 minutes of baking.

Step 4

Remove from oven and carefully place contents in a blender and puree until combined.

Step 5

Stir in half and half and basil, and serve hot.