I use either a mug, or "boil-N-Bag" bags from my local Raley's Market.
For the food: Instant rice, instant refried beans (found ing the mexican asle), dried mushrooms (from the Oriental asle), dried fruits, nuts, coconut shreds (from health food store-unsweetened), dried red chili peppers, and some various spices.
Mix in bag dry at home, hot water in camp-steep for 10-15 minutes, then eat.
I use chopsticks. Able to reach into bag and get all the tasty food. Snow Peak even makes a backpack set of sticks, they come apart to make a small unit for in-cup storage.
Sometimes I throw in dried sardines, and mix-n-match other dried items from my local asian markets. Unbelievable what you'll find at these asian markets. Much better than the heavy salted, over kcal foods in the marketed "off-the-shelf" vendors.
Check also the Trail Cooking site for some other FUN options for making your own meals.
Once you start making up your own meals, you'll just laugh when you see the packaged meals at such high cost!