Start by cooking the bacon until crisp. Remove to a plate lined with a paper towel and allow to cool.
When the bacon is cool, crumble.
In a small bowl, mix the dressing by whisking together the greek yogurt, mayonnaise, white vinegar, sugar, poppy seeds and salt and pepper until smooth and creamy.
To serve, combine the spinach and lettuce and divide between four plates.
Top each plate with equal portions of the bacon, strawberries, avocados, and sliced almonds.