Bacon Cheeseburger Soup

I bought a PDF book called Simple Food {For Winter} from Nourishing Days blog a few days ago. One of the recipes in the very informative book was Cheeseburger Soup. For those that know me, know I can't follow a recipe. So this is my spin on her lovely dish.
-Amanda

Bacon Cheeseburger Soup

1 large onion
1 lb bacon (nitrate free)
1 lb hamburger meat
1 potato
3 carrots
3 cups of homemade bone beef stock
2-3 cups water
1 cup plus 1 cup of raw white cheddar
1/4 cup ketchup (either homemade, or a natural brand with no fake sugars)
1/8 cup mustard
1/2 cup spaghetti sauce (or diced tomatoes)
fermented pickles to garnish (Bubbies brand is recommended!)

Cut up bacon into small pieces and render in a big soup pot. When bacon crisps up, remove from pot, leaving bacon grease behind. Slice the large onion by first halving it and then making very thin half moon slices. Add onion to the pot, set to low and cover. Every 10-15 minutes stir, but otherwise let cook low and slow for 30-40 minutes. You want the onion to caramelize and this takes patience. Once onion is caramelized, remove it from the pot. Add ground beef. Season with salt and pepper and stir until broken up and browned. Add diced potato and diced carrots. Add beef broth and water. Stir in ketchup, mustard and spaghetti sauce. Add in 1 cup of freshley shredded cheddar. Put the onions back into the soup and simmer until potatoes are cooked through. Garnish with fermented pickles, bacon and more cheese.