Combine first 6 ingredients in a bowl. Mix well. Form into 18 balls. Set aside. Pour 1 jar marinara into crockpot. Add bell peppers and stir well. Add meatballs to sauce. Pour remaining sauce over the meatballs. Cook on low 6 hours or on high 4 hours. Place 3 meatballs into each of 6 hoagie rolls. Spoon sauce over the meatballs. Top with cheese.
Beat eggs until frothy. Toss zucchini slices and egg whites until zucchini is well-coated. Arrange in a single layer on a cookie sheet lined with parchment paper. Sprinkle with salt. Bake at 450 for 30 min or until zucchini is browned and crisp, turning after 15 minutes.
Sautéed Peppers and Onions
Heat oil over med heat until hot. Add peppers and onions. Saute over med heat until peppers and onions are tender-crisp and beginning to brown, about 10 minutes. Serve on meatball subs or alone.