Spicy Rigatoni

8 oz rigatoni
2 Tbsp olive oil
1/2 white onion
1/2 shallot
5 cloves garlic
2 Tsp chili flakes (or to taste)
1/4 cup veggie broth
1/4 cup tomato paste
Salt to taste
1/2 cup-3/4 cup heavy cream
2 oz Parmesan cheese
Pasta water accordingly