Step 1
Start by heating the oven to 350°F (175°C). In a large skillet over medium-high heat, warm up some oil, then add the chopped onion along with a splash of broth. Let it cook for about 3 minutes until the onion starts to soften. Toss in the mushrooms, garlic, Italian seasoning, vinegar, a pinch of salt, and some crushed red pepper flakes. Cook everything together for another couple of minutes. Take the pan off the heat, then stir in the lentils and fresh spinach until the spinach wilts a bit.



