Add the olive oil to a medium size frying pan over high heat and wait until it begins to lightly smoke, about 2 to 3 minutes.
Next, add the onion sliced in half cut side down onto the pan with oil and turn the heat down to medium-high.
Sear the onion for about 2 minutes or until it is very well caramelized. Remove the onion and place in a large stock pot.
Add the cuts of meat, carrots, celery, tomatoes, garlic, parsley, bay leaf, peppercorns, and cloves to the stock pot along with the onion and 1 gallon of water.
Bring the brodo to a boil over high heat.
Once boiling, skim the scum off the top of the brodo and then simmer on low heat for 2 hours. Return to skim the scum every 20-30 minutes.
Using a ladle, remove the liquid from the brodo one ladle at a time and pour through a fine mesh strainer into another pot or storage container until all the liquid is strained.
Discard the vegetables and feel free to use the cooked proteins in another recipe.
