Peppers stuffed with beef and tomatoes

Ingredients

• 3/4 cup fresh whole-wheat breadcrumbs
• 4 large yellow peppers
• 1 tbsp olive oil
• 1 onion (finely chopped)
• 350 g lean ground beef
• 1 garlic clove (crushed)
• 3/4 cup canned chopped tomatoes
• 1 tbsp fresh sage (chopped, or 1 teaspoon dried sage)
• 1 tsp fresh rosemary (chopped, or 1⁄2 teaspoon dried rosemary)
• 1 1/4 cups diluted salt-reduced or homemade vegetable stock (hot)
• 1/4 cup aged cheddar cheese (grated)
• 2 fennel bulbs (cut into 5 mm slices lengthwise)