How to properly mix cooked noodles and vegetables?
I'm assuming you mean cooked asian noodles and not Italian pasta as the two problems are different. One thing is to make sure you are boiling the noodles in plenty of water as this will reduce the starch on the noodles which cause sticking, or rinse the noodles after cooking to wash the starch off. Next, make sure the stir fry mix isn't too dry, moisture will help the flavors distribute and lubricate the noodles, helping keep them apart. You can always add a small amount of water, it won't ruin anything. Last, use two spoons to mix the noodles up, grap bunches of noodles to pull them apart. Alternatively you can use tongs, the result is the same but I find 2 spoons quicker.