Sauté pepper and onion blend until vegetables are crisply tender. Hold warm.
Spread approximately 1 tablespoon marinara sauce over panini bread.
Top with 2 slices of cheese and 1/4 cup vegetable blend.
Sprinkle with Italian seasoning, if desired.
Bake at 400°F until cheese is melted, 4 to 6 minutes.
Hold warm until ready to serve.
CCP: Maintain hot food at 135°F or above