Fast-cooking shrimp and the simplest tomato butter sauce help make this meal come together quickly. Vegetarian: sub white beans for shrimp. Paleo: sub zucchini for penne.
Bring a large stock pot (large enough to hold pasta and broccoli) of water to boil. Salt generously and add pasta. Cook pasta according to package directions. Add broccoli in the last 2 minutes of cooking. Save 1/2 cup / 120 ml (for 4 servings - adjust if customizing) of salted pasta water before draining.
While pasta is boiling, heat a saute pan (that can fit shrimp, pasta, and broccoli) over medium heat. Add half the butter. When butter is melted, add garlic and tomatoes and saute for 1 minute.
Add shrimp and saute until shrimp is cooked through, ~4 minutes. Stir in remainder of the butter and pasta water.
Mix in pasta, broccoli, and lemon juice. Season with some salt and pepper to taste and enjoy!