Cut the bell peppers in half lengthwise and remove the cores and seeds. Rub the skins of the bell peppers with 1 tbsp olive oil and arrange the peppers skin side down on a greased baking sheet.
In this order, scatter half the garlic into the bell peppers, add the cheese, mint leaves, lemon zest, remaining garlic, thyme, pine nuts, and pepper. Drizzle the remaining oil and the lemon juice over the peppers.
Roast the peppers in a preheated oven at 400 degrees Fahrenheit for 30 minutes, until tender and beginning to char around the edges.