Pressure Cooker Lentil and Kale Soup

Name: Pressure Cooker Lentil and Kale Soup
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Yield: 6 to 8 serving(s)
Ingredients: 1 leek, thinly sliced; 3 garlic cloves, chopped; 1 tbsp (15 ml) olive oil; 2 cups (300 g) sweet potatoes, peeled and cubed; 1 cup (200 g) dried green lentils, rinsed and drained; 4 oz (115 g) kale leaves, stems removed, chopped; 5 cups (1.25 litres) vegetable broth; 1 can (14 oz/398 ml) diced tomatoes; 2 tbsp (30 ml) red wine vinegar