Parsnip and Lentil Soup with Cumin and Lemon

Ingredients

• 1 carrot (, finely chopped)
• 2 medium onions (, finely chopped)
• 2 cloves garlic (, minced)
• knob of butter (, and a little olive oil)
• pinch of salt
• 2 tsp cumin seeds
• 4 medium/big parsnips (, about 550 gr, peeled and chopped)
• 130 gr red split lentils (, rinsed in a sieve under plenty of cold water)
• 1.6 lt vegetable stock
• juice of 1 lemon
• chopped parsley ((optional))