Mix in the onion and season with salt. Cook for 3-4 minutes while stirring.
Add garlic and ginger, and cook 2 more minutes while stirring.
Finally, add sweet potatoes, bell pepper, lentils and broth. Bring to a boil, then reduce heat and simmer uncovered for 25 minutes.
While the stew simmers, prepare a bowl of freshly shaved parmesan cheese to use as a topping. This is also a great time to warm in the oven some brown grainy bread to serve on the side!
Notes
Store leftovers in an airtight container in the fridge for tomorrow's lunch!