4 medium zucchinis, 1 tbsp avocado or olive oil, 1 lb ground beef (grass fed, if possible), ½ white or yellow onion, diced, 3 cloves of garlic, minced, 1 tbsp dried oregano, 1 tsp dried marjoram, ½ tsp red pepper flakes, ½ tsp sea salt, ¼ tsp pepper, 24 oz marinara sauce