Corned Beef with onion

2 teaspoons olive oil ½ cup chopped onions 2 cloves garlic 1 stalk celery diced 6 cups broth leftover from simmered corned beef, strained (or use beef broth[...]

6 slices bacon , cut crosswise into 1/4 inch pieces 1 1/4 cups onions , chopped fine 1 cup sliced carrot 6 russet potatoes , peeled and cut into 3/8 inch[...]