Try this recipe for an "American" French dressing - a creamy red-orange, English-style dressing that mixes sweet with tangy with savory. This dressing has so many more layers of flavor compared to the store bought version, and is almost as easy to make as pouring from a bottle.
Add all the ingredients except for the ketchup and mayo to a blander and blend until the salt and sugar are dissolved and the onion is completely disintegrated.
1/2 Small Onion, 1/2 C Vegetable Oil, 1/3 C Vinegar, 1/3 C Sugar, 1 Clove Garlic, 1 tsp Paprika, 1/2 tsp Salt
Mix in the ketchup and mayo.
1/2 C Ketchup, 1/2 C Mayonnaise
You can serve immediately, but the flavors improve if you chill the dressing for at least a half hour before serving.
Notes
You can use olive oil in place of vegetable oil, but make sure it is on the lighter side. You do not want flavor from the oil.