enough for 1 person, or two lightly hungry people.
1 cup flour
1 egg( or two and use less water)
enough water to make the dough the right consistency( add a tablespoon at a time)
EDIT: for the hungry stoner, double what is above.
its all on learning how wet the dough needs to be. don't expect to get it perfect the first go around. it needs to be wet enough to knead well, but dry enough to not be a sloppy sticky mess and to not get soggy when you cook it. its a lot drier than bread dough or pizza dough.
simply mix, knead until smooth, adding a little water or flour depending on if its too wet or dry, then let it rest for 15 minutes for rolling into snakes for shaping things like the ones i posted above, and 20-30 for rolling flat. and then cut and shape your pasta.
its real simple, and the google videos get you the basics visually. from there you can learn what the dough needs to "feel" like for that perfect pasta. the stuff in the bowl above was perfectly al dente. it took me at least 5 times to get the pasta to where i wanted it. but now its so easy i can make all i need in 20-30 minutes, which is how long it takes to cook the pasta sauce. so when the sauce is done im ready to toss the pasta in boiling water. from there it cooks in 2 minutes far faster than dry store pasta.