Wash and pit the bellpeppers. Cut them in half.
Line a baking sheet with aluminum foil and place the bellpeppers with the skin up on the tray.
Add a splash of olive oil to the bellpeppers.
Place in the top third of your oven and turn on the broiler. Roast them until the bellpeppers are soft and the skin turns brown and bubbly. Around 20-30 minutes.
Remove the tray from the oven und cover the bellpeppers with a damp kitchen towel. Do not skip this step! Or else the bellpeppers will be a complete pain to peel.
After 10-15 minutes remove the towel. You should be able to just peel of the skin of the peppers.
Cut the bellpeppers into slices and place in a big bowl.
Peel the onion and cut into thin slices. Add to the bellpeppers.
Add the lemon, olive oil and salt and pepper to taste. Mix well and serve with some bread or as a side dish for any fried meat.