White Mushrooms
Mushrooms are a great substitute for meat, so if you want to reduce your meat intake, at least make sure you get your protein from somewhere else. As for their calorie content, one cup of white mushrooms (about 70 grams) has just 15 calories.
Onions
There’s not a single household out there that doesn’t have onions, and for good reasons. Onions are a commonly used ingredient in most dishes. And although it comes in many shapes and colors (red, yellow, white, scallions, or spring onions), in general, one medium onion (110 grams) packs around 44 calories.