Step 1In a large skillet, heat 2 tablespoons of the olive oil over medium-high heat until hot but not smoking. Add the diced onion. Mince 1 clove of garlic and add it to the pan, then cook until the onion and garlic are translucent, about 4 minutes.
Step 2Add the peas and cook over medium heat until the peas are just tender, about 6 to 8 minutes, depending on the size of the peas. Season to taste with salt and pepper.
Step 3Remove the pea mixture from the heat and puree with a hand blender (you can also puree it in a food processor or upright blender).
Step 4In a medium skillet, heat 1 tablespoon of olive oil until hot but not smoking. Add the pancetta and cook, stirring occasionally, on medium heat until the meat browns and renders its fat. You may need to carefully pour a little fat out of the pan from time to time to keep the grease from splattering. Remove the pancetta from the heat and transfer onto paper towels to drain.
Step 5Cut the remaining clove of garlic in half and rub a cut end on each piece of the toasted bread to impart a subtle garlic flavor. Discard the garlic.
Step 6Evenly distribute the pea puree among the pieces of toasted bread and spread to the edges. Sprinkle pancetta, mint and chile flakes over each. Drizzle with the remaining 2 tablespoons of olive oil and serve immediately.