As long as you're on the way towards accomplishing your goals (for you, primarily weight loss) with the way your food is right now, go for it. Eat until almost full, not totally full. In the beginning, you can get away with quite a lot and still lose weight. The trick comes later on down the line, when you are approaching goal weight. At that point, you may need to kick it into fifth and use everything in your bag of tricks (including portion control), but for now it's unnecessary. I have found that now (70 pounds down on a small 5' 0" frame) I DO have to utilize portion control and not eat the entire amount the recipe made, like before.
My triglycerides were 178 to start, now 66; blood pressure borderline high, now normal. So your other goals are also within reach for you. Welcome to the tribe.
"Let food be thy medicine and medicine be thy food." -- Hippocrates