In a large bowl, combine the spinach, dill and strawberries. Refrigerate until chilled.
In a large glass jar with tight fitting lid, combine the oil, vinegar, sugar, garlic powder, onion powder, salt, black pepper, dry mustard and cayenne pepper. Shake well until sugar is dissolved.
Pour dressing over chilled fruit and greens; toss to coat and sprinkle with sesame seeds.
