Lentil and walnut meatloaf

Name: Lentil and walnut 'meatloaf'
Ingredients: 1 tbsp olive oil; 1 onion, finely chopped; 2 cloves garlic, finely chopped; 1 carrot, peeled and grated; 1 red capsicum, (bell pepper) finely chopped; 1 tsp dried thyme; 1 tsp cumin powder; Pinch cayenne pepper, (optional); 1 can brown lentils, drained; 1/2 cup walnuts, roughly chopped; 1/2 cup rolled oats, (gluten free if required); 1/2 cup canned chopped tomatoes; 1/4 cup instant polenta; 1 tbsp chia seeds; 1/4 tsp salt; Black pepper to taste; For the glaze:; 1 cup canned chopped tomatoes; 1/4 cup smoky bbq sauce; A little salt and pepper to taste