Roast beef burritos

Name: Roast beef burritos
Ingredients: ⅓ cup olive oil; 3 medium brown onions, sliced; 3 garlic cloves, sliced; 1 tsp salt; ½ tsp chilli powder; ½ tsp paprika; ½ tsp cumin; ½ tsp pepper; 400g tin red kidney beans, drained; 200g chopped tinned tomatoes; 300g roast beef, cut into thin strips; 8 jumbo tortillas; 1½ cups cooked brown rice, warmed; 1 cup grated cheddar cheese; 8 heaped tbsp guacamole; 2 handfuls rocket, picked and washed; pickled sliced jalapenos