Yield: 4 Tostadas (4 points per tostada for myWW blue and purple, 6 points for green)
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Preheat oven to 350 degrees F.
In a small bowl mix together the fat-free sour cream and ranch dip seasoning. Set aside.
Put the tostada shells on a baking sheet. Add the chicken and cheese to each one.
Place in the oven for 5 to 7 minutes, or until the cheese is melted.
Add the lettuce, green onion, bacon and ranch sauce.