Crisp the pepperoni in olive oil, reserving a few slices for the top.
Add the onion and bell pepper and cook for 4–5 minutes.
Stir in the garlic and seasonings for 30 seconds.
Add the beans, pizza sauce, water and optional Parmigiano rind.
Simmer uncovered for 10–15 minutes, then remove the rind.
Top with both cheeses and the reserved pepperoni, then broil in an oven-safe skillet for 3–5 minutes until bubbly.
Finish with fresh basil and enjoy!
