The Chronicle
Pella —
| 1 Tbsp | extra virgin olive oil, plus more for brushing rolls |
| 1 1/4 lb | mild italian sausage links, casings removed |
| 1 lg | yellow onion, peeled and diced |
| 1 Tbsp | balsamic vinegar |
| 1/4 tsp | salt |
| 1/8 tsp | freshly ground black pepper |
| 1 pinch | red pepper flakes (optional) |
| 1/2 c | canned diced tomatoes with basil, garlic and oregano, drained |
| 1 sm | clove fresh garlic, minced or pressed |
| 2 c | jarred tomato basil sauce |
| 3 Tbsp | finely chopped fresh basil leaves |
| 16 | slider rolls, split horizontally |
| 1-1/2 Tbsp | grated parmesan cheese, or to taste |
| 16 slc | mozzarella cheese (about same size as rolls) |