Brown 1 lb of ground beef. When beef is halfway cooked through, add diced onions. Finish cooking together.
Drain beef. Add diced chilis, cilantro, and refried beans. Stir.
Add paprika, chili powder, cumin, salt, and juice of lime.
Warm tortilla shells in the microwave. Put on plate with a slightly damp paper towel. Microwave for 1 minute.
Put about 1/4 cup of beef mixture in middle of tortilla shell. Sprinkle with cheese.
Fold sides toward middle, touching sides. Fold ends toward middle. Place seam down in casserole dish .
Continue till beef mixture is gone. Brush outside of chimichangas with butter.
Cook for 15-20 minutes at 400 degrees. Broil on high for 2 minutes (do not walk away from oven;)
While chimichangas are baking, put a saucepan on stovetop for making queso sauce.
Heat canola oil in saucepan. Add flour and whisk together.
Slowly whisk in beef broth, stirring to get a smooth mixture. Continue stirring at a simmer until sauce thickens. About 5 minutes.
Remove from heat. Add in cheese, stirring til melted.
Add in spices and heavy cream.
Keep queso sauce warm and serve over hot chimichangas with sour cream and salsa.