I'm deciding to make spaghetti squash today but can't decide what sauce to use: a pasta sauce or spaghetti sauce. I'm sure those are just general terms for many types of sauces, but can anyone give me an idea of the difference between the two? And also, what is marinara sauce? 
Yes you can eat it. It is the same as a potato. You get brown spots on your potato you just cut the brown out. This is the same for garlic. If it is molded I would through it all out. I have eaten garlic and potatoes that have had brown spots for years. I'm still alive and kicking. I hope this helps. 