Preheat oven to 375°F. Chop raw bacon into 1 inch pieces. Place into large frying pan or skillet and cook on stove top until bacon is crispy. Remove bacon but reserve bacon fat. Toss raw Brussels sprouts into frying pan to coat with bacon fat. Scoop out the sprouts and place them onto a large baking sheet lined with foil.
Roast for about 30 minutes, flipping sprouts to the other side halfway through the time. Sprouts should have a slight char. Pour sprouts back into frying pan and add bacon, chili flakes, lemon juice (if using) and salt and pepper to taste. Stir and cook for about 5 minutes until spices and seasoning are incorporated and bacon is heated.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.