In a large sauce pot over MEDIUM-HIGH heat, cook onions with the olive oil until translucent- about 3 minutes.
Add remaining ingredients and cook until thickened- about 5 minutes. Season with salt and pepper to taste.
In a small bowl, mix together the parmesan, garlic, oregano and chili flake. Mix well and reserve a couple Tablespoons for garnish later.
Place tortillas in the microwave to soften- about 30 seconds.
Once the tortillas are softened, sprinkle the parmesan mixture over the tortilla and roll tightly over the string cheese to form a stick.
In a large skillet, preheat oil until it begins to shimmer (~350F). Add sticks flap side down (this helps keep them together) and cook until golden. Repeat on all sides until golden and cheese begins to melt- about 4 minutes.
Place sticks atop a large spoonful of the marinara, sprinkled with the remaining parmesan mix.
Use the leftover marinara for pasta night! It can also be frozen for later use.Print Recipe