Heat 1/4 cup olive oil, 3 sage sprigs, the zest of 1 lemon (in strips) and a pinch of red pepper flakes in a skillet over medium-high heat, 1 minute. Add 6 to 8 baby bell peppers; cook until softened, about 3 minutes. Add 8 smashed garlic cloves and cook 3 more minutes. Add 1 cup mixed olives and cook 2 more minutes. Transfer to a dish and serve with crusty bread.