2 red bell peppers, seeded
1 red onion, peeled
2 garlic cloves, minced
2 T. olive oil
1 ½ t. kosher salt
½ t. freshly ground black pepper
1 ½ T. tomato paste
Preheat oven to 375 degrees. Spray a baking sheet with nonstick spray and set aside.
Cut the eggplant, bell pepper, and onion into 1-inch cubes. Toss them in a large bowl with the garlic, oil, salt, and pepper. Spread in a single layer on the prepared baking sheet and roast for 40-45 minutes, tossing once halfway through, until vegetables are lightly browned and soft. Cool slightly.
Place the vegetables in a food processor fitted with a steel blade, and the tomato paste, and pulse 3 or 4 times to blend. Taste for salt & pepper.