Heat the avocado oil in a large skillet over medium/high heat. The oil is ready when it lightly shimmers.
Carefully add half of the dried radish slices to the oil, stirring them occasionally until they're browned.
Remove the radishes from the oil using a slotted spoon and drain them on paper towels. Continue the same process with the remaining sliced radishes. Set aside.
Form the ground beef into 4 patties. Season them liberally with salt and pepper.
Cook the patties to your desired doneness and top with your favorite cheese, if desired.
While the burgers are cooking, add the butter to the same skillet large skillet with the remaining oil from the radishes. Add the spinach and cook, over medium heat, stirring until the spinach wilts down. Approximately 2-3 minutes.
Add the garlic, cream, lemon juice, nutmeg, and lemon zest to the spinach.
Reduce the heat to low and cook an additional 2-3 minutes. Remove from the heat.
Top each burger with the creamy lemon spinach and some of the fried radish chips. Serve and enjoy.