South of the Border Chicken Cacciatore

4 chicken breasts, with bone-in
1/8 teaspoon salt
1/8 teaspoon freshly ground black pepper
2 tablespoons olive oil
1 medium onion, cut into wedges
4 cloves garlic, chopped
1 red bell pepper, thinly sliced
1 green bell pepper, thinly sliced
1 (14 ounce) jar pizza sauce
1 (8 ounce) jar Ortega