Four Corners Lentil Soup

Name: Four Corners Lentil Soup
Ingredients: 1 tablespoon coconut oil or ghee; 2 large onions or leeks, white and pale-green parts only, chopped; 5 garlic cloves, minced; 1 tablespoon minced fresh ginger; Fine sea salt; 1 tablespoon ground cumin; 1/4 teaspoon cayenne pepper, or more to taste; 1 (15-ounce / 400g) can whole tomatoes, or 5 large fresh tomatoes chopped; 1 small organic lemon, sliced; 1 cup / 200g red lentils, picked over and rinsed very well (soaked, if possible); 4 cups / 1 liter vegetable broth; Pure maple syrup or raw honey (optional); Fresh cilantro leaves, sliced spring onions, or flat-leaf parsley leaves, for garnish