Step 1
To a big pot over medium-high warmth, add the pancetta and cook dinner, stirring sometimes, till the fats renders, about 12 minutes. (If the pancetta begins to brown too quick, flip the warmth to medium-low.) Utilizing a slotted spoon, switch the pancetta to a paper towel-lined plate and put aside to empty.
Step 2
Return the pot to medium-high warmth and add the oil. When it’s sizzling and shimmering, add the onion and cook dinner, stirring sometimes, till tender and light-weight brown, about 10 minutes. Add the celery, tomatoes, and ¼ cup of water and season to style with salt and black pepper. Cowl the pot and cook dinner, stirring sometimes, till the celery could be very tender, about 1½ hours.
