Meatballs in chipotle sauce

Name: Meatballs in chipotle sauce
Cook time: 45 min
Total time: 45 min
Cuisine: Mexican, Latin American, American
Ingredients: 300g beef mince; 300g pork mince; 1/2 tsp ground cumin; 1 clove garlic, finely chopped; sea salt and freshly ground pepper; 1 cup fresh breadcrumbs; 2 large eggs; 1 tbsp milk; extra virgin olive oil; manchego or pecorino cheese, to serve; 4 ripe tomatoes; 2 chillies from a can of chipotle chillies in adobo sauce, strained, plus 1 tsp of the strained sauce; 2 cloves garlic; 1/4 tsp ground cumin; 1/2 tsp dried oregano; 1/2 tsp sea salt; 1 cup chicken stock