Brush the foil with a ½ Tbsp of olive oil and add salmon filets to the foiled baking sheet.
Brush the top of the two salmon filets with another ½ Tbsp of olive oil.
Sprinkle ¼ tsp of sea salt and ¼ tsp pepper between the two filets.
Place in the oven and bake for about 14-16 min or until the center of the thickest part of the filet reaches 145 degrees.
Make the Sauce
While the salmon is baking, prepare the sauce by adding the vinegar, orange juice, honey, brown sugar, cardamom, and pinch of salt to a bowl and mixing the ingredients until combined.
Heat 1 Tbsp of olive oil in a medium sized skillet on medium heat.
Add garlic and shallots to the oil and sauté for about a minute.
Add 1 cup of the blackberries and the vinegar mixture to the skillet and begin smashing the blackberries with the back of a large spoon (a serving spoon works well).
Bring to a gentle boil and reduce heat to simmer for about 8 minutes, continuing to smash the blackberries and stirring occasionally.
Gently stir in the last ¼ cup of blackberries and continue to cook the sauce for an additional 2 minutes, leaving the newly added blackberries whole.
Garnish and Serve Salmon
Remove the salmon from the oven when it reaches 145 degrees.
Plate the salmon and top each filet with half of the blackberry sauce.