Preheat oven to 300°F.
Slice tomatoes in half and place face-up on parchment-paper lined baking sheet.
Drizzle evoo and sprinkle with salt, pepper, and oregano.
Roast at 350°F for an hour and a half and allow to cool.
Store in covered container until ready to use.
Blend basil, arugula, pine nuts, garlic, lemon juice, oil, mayonnaise, salt, and pepper together.
To serve, mix romaine and arugula with quinoa and half of the dressing.
Top with roasted tomatoes and toasted pine nuts.
Drizzle with remaining dressing or serve with dressing on the side.