Shrimp and Broccoli Penne

whole wheat penne (cooked according to package instructions)

olive oil (divided)

raw shrimp (peeled and deveined)

salt

pepper

garlic (grated)

large heads broccoli - cut into florets (about 4 cups)

juice and zest of lemon

parmesan cheese (minced parsley or basil and red chili flakes - to serve)

chili flakes and parmesan cheese (optional garnish)