Hard boil eggs on stove. Cool and remove shells.
Meanwhile, cut a handful of spinach leaves in thin strips and finely chop a small section of onion if using fresh.
Place spinach and avocado in a small mixing bowl. Add whole eggs, or just the yolks, slicing cooked whites lengthwise and setting aside.
Mash gently with a fork. Season to taste with lime, salt, dill, and onion.
Serve egg mash in remaining spinach leaves (over arranged sliced egg whites, if you kept them).
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