Cook pasta according to package directions in salted water. Drain and set aside.
Add cottage cheese, milk, half of the shredded cheddar, cornstarch, garlic powder, Dijon mustard, smoked paprika, onion powder, salt, and pepper to a blender. Blend until completely smooth.
Melt butter in the same pot over medium-low heat. Pour in the blended cheese sauce and stir for 2-3 minutes until warmed and slightly thickened.
Reduce heat to low. Add remaining shredded cheddar one handful at a time, stirring until melted and smooth.
Add cooked pasta to the sauce and fold until every piece is coated. Stir in chicken or turkey bacon if using.
Serve immediately topped with extra cheddar, chives, pepper, or hot sauce.