In a large skillet over medium-high heat, heat oil and brown sausage, breaking up into small pieces using a wooden spoon.
Cook until golden brown, 5.
Transfer to bowl and reserve oil in skillet.
Sauté garlic and shallot over medium-low heat with reserved oil from sausage until softened, about 2.
Turn off heat and add 1 tablespoon orange zest, 1/2 cup fresh orange juice and red wine vinegar; season with salt and pepper.
Cut off rind of remaining orange and cut into segments.
Add to dressing.
Toss lettuce with a drizzle of dressing and transfer to a large platter with orange segments.
Break up burrata by hand and place on lettuce.
Add a drizzle of olive oil, sprinkle with red pepper flakes and sea salt, and garnish with parsley.