Italian Sausage and Peppers

Ingredients

• freshly ground black pepper, to taste
• 3 bell peppers, chopped - multicolors
• 1/2 tsp. kosher salt
• Cooked Spaghetti
• 1 tsp. Italian seasoning
• 4 Tbsp. olive oil, divided
• 1/2 tsp. red pepper chili flakes
• 1 tsp. fennel seeds
• 1, 12 oz. package Italian chicken sausage, sliced into rounds
• 2 tsp. garlic, crushed
• 1, 28 oz. can crushed tomatoes
• 1 small white or yellow onion, chopped