One-pot red wine sausages lentil – updated recipe

Name: One-pot red wine sausage lentil - updated recipe
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Ingredients: 12 sausages; 30 ml olive oil; 1 onion (diced); 2 cloves garlic (chopped); 12 cherry tomatoes (halved); 25 g flour (about 1 heaped tablespoon); 1 pinch dried mixed herbs; 250 g pre-cooked puy lentils (pre-cooked, puy or green lentils (drained)); 3 g fresh parsley (chopped for garnish); 30 ml tomato puree; 250 ml red wine (red or white - optional); 250 ml chicken stock (use stock cube chicken or beef); 900 g white potatoes (peeled and cubed); 1 knob butter; 60 ml milk; 400 g sweetcorn (frozen or canned)