This was found in a newsgroup and adapted to make it paleo. Patti Vincent
has tried it and her guests loved it. The onions is a late addition and
Patti did not include them. Maybe the onions should be fried in the bacon
fat first? Maybe put on a topping of guacamole after baking?

Baked Eggs in Bacon Rings
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6 strips nitrite-free bacon or fresh pork side
melted bacon fat for brushing tins
4 slices tomato, each about 1/2 inch thick
4 eggs
pepper to taste
chopped onions (optional)

Preheat the oven to 325. Cook bacon in a skillet over medium heat until it
begins to shrivel, about 3 minutes. Remove from heat. Brush 4 cups in a
muffin tin or 4 small ramekins with bacon fat. Place a tomato slice in the
bottom of each cup. Circle the inside of each cup with 1 1/2 strips of
bacon. Break an egg into each muffin cup and season with pepper. Can add
chopped onions. Fill any unused tins with water to protect them from
burning. Bake in the oven for 20 minutes. To serve, loosen the edges of the
eggs with spatula and transfer the eggs to plates. Serves 2.
Adapted from Dr. Atkins' Quick and Easy New Diet Cookbook: