SMOKY PRAWN AND BLACK BEAN SOFT TACOS

4 soft tortilla boats • 1 tbsp sunflower oil • 1 garlic clove, crushed • 150g raw king prawns • 2 tsp Bart Smoky BBQ Seasoning • 400g can black beans, drained and rinsed • 8 cherry tomatoes, halved • 1 red chilli, finely chopped • ½ red onion, finely chopped • 1 lime, juice • 1 little gem lettuce, shredded