Olive stuffed peppers

Ingredients

• 4 bell peppers
• 150 grams red lentils
• 1 small onion, finely chopped
• 3 large cloves garlic, crushed
• 1 tablespoon tomato puree
• 400 grams tinned chopped tomatoes
• 350 grams black pitted olives in brine, drained and roughly chopped
• 2 teaspoons dried oregano
• a good dash of tabasco
• olive oil