Crockpot Savory Split Pea Soup

2 Tablespoons canola oil
1 Cup onions, minced
8 Cups water
1 Pound green split peas, washed & stones removed
4 Whole cloves
1 Bay leaf
1/4 Teaspoon pepper
6 Ounces ham, cubed
1 Cup celery, finely minced
1 Cup carrots, diced
1/8 Teaspoon dried marjoram
3/4 Teaspoon salt
1/8 Teaspoon dried savory

Combine all ingredients in crockpot, cover and cook on LOW 8 to 10 hours.