Creamy Chipotle Shrimp Pasta

Name: Creamy Chipotle Shrimp Pasta
Ingredients: 12 oz. penne pasta; 1 lb. large shrimp, peeled, deveined, tails removed; 3 tbsp. extra-virgin olive oil, divided; 1 large red bell pepper, seeds and ribs removed, coarsely chopped; 3 scallions, thinly sliced, plus more for serving; 4 cloves garlic, finely chopped; 1 small jalapeño, seeded, 1/2 chopped, 1/2 thinly sliced; 2 chipotle chiles in adobo, finely chopped, plus 2 tbsp. sauce; 2 tbsp. tomato paste; 1.5 c. heavy cream; 0.5 c. finely grated Parmesan