
2 tablespoons olive oil
¼ cup butter, divided
4 skinless, boneless chicken breasts
Salt, to taste
Freshly ground black pepper, to taste
½ cup chicken stock
4 teaspoons grated lemon zest (zest of 2 lemons)
6 tablespoons lemon juice (juice of 2 lemons)
2 tablespoons minced garlic
4 sprigs fresh rosemary
1 (16-ounce) package bow-tie pasta
1 bunch asparagus, woody ends removed
1 large yellow bell pepper, seeded