Wash and rinse the lentils thoroughly. Remove any debris and discard.
Boil lentils in a saucepan covered with water, with 1 bay leaf, 1 celery stalk, salted. Cook 30 minutes or as indicated on package.
Meanwhile, preheat your oven to 225 C / 420 F with the rack in the center. Place the bell peppers & onion on the rack, bake 20 minutes. Remove from the oven and allow to cool for 10 minutes. Chop them finely.
Allow lentils to cool before assembling the salad.
Transfer the cooked lentils to a large bowl. Add the baked & chopped veggies.Mix well.
In a small pan, heat olive oil and fry olives on high heat.
Add the fried olives to the salad.
Sprinkle it with coarsely crumbled goat cheese.
Adjust salt and pepper.
Place in the fridge for at least 30 minutes before serving.