In history, the Irish were screwed by English landlords. So what they did to survive was gather plain old white clover blossoms amd toss them into soups and mixed these into flour to "stretch" it when making bannock.

Also, when grass goes to "seed" then every meadow has grass seed. You NEVER EVER eat it if it is black as that is ergot. Otherwise, the white clover and grass seed has the most calories in the small region.

While there, the Native Americans started at the periphery of a meadow. Then walked in concentric circles. This drives all critters and grasshoppers and snakes into the center. Then these are harvested.

Any couple of 12 year olds can manage this and should be taught this. It ain't perfect as there may be amino acid deficits.

I guarantee your teen can do this. When you do this, cut a y shaped branch to "pin" then head of the snake. Then you dispatch it safely as the head may be venomous. Bury that rascal. Then peel the snakeskin off and save it.

Now boil water. Throw in pieces of snake with the bones on. DO NOT GRILL IT or you waste calories through drippings. Toss in white cliver blossoms and grasshopper parts. Parts are hard as they have exoskeletons made of chitin which you can't digest.