Spinach Salad with Steak and Blueberries Recipe | Say Mmm

Ingredients

• 1 cups fresh blueberries, divided
• 0.5 cups chopped walnuts, toasted (see Tips)
• 3 tablespoons fruity vinegar, such as raspberry vinegar
• 1 tablespoons minced shallot
• 1 teaspoons sugar
• 0.5 teaspoons salt, divided
• 3 tablespoons walnut oil or canola oil
• 1 pounds (1-1 1/4 inches thick) sirloin steak or strip steak, trimmed
• 0.5 teaspoons freshly ground pepper
• 8 cups baby spinach
• 0.25 cups crumbled feta cheese