Preheat the oven to 350℉. Grease and flour your 8-inch or 9-inch loaf pan. Even if it is non-stick, using a piece of parchment overhanging on each side is a nice extra layer of security that it will come out easily.
Place dry ingredients in a small bowl, whisk together and set aside.
Unless you are using orange-flavored olive oil, place the sugar in the medium-sized bowl first, along with the orange zest and using your hands, incorporate the zest with the sugar.
In the medium-sized bowl with the sugar and zest, add in the eggs and olive oil and beat vigorously. Then add the buttermilk, vanilla, and liqueur and whisk until incorporated again.
Add the dry ingredients about ⅓ at a time just until incorporated. I used a whisk to start, then a wooden spoon to finish.
Spoon about ½ of the batter into your prepared loaf pan. Measure out a generous ½ cup of your roasted strawberries and spoon about half of those on top of the batter. Then spoon most of the batter over that layer, Then the rest of the strawberries, then the final bit of batter over those. The second layer of strawberries does not need to be covered completely.
Take a chopstick and make a figure 8 type of pattern in the batter moving down the pan – probably will take about 3 strokes. This movement will “marble-ize” the added strawberries into the batter. It's ok to repeat this process one more time but don’t overdue do it or it will not have the marble look.
Bake at 350℉ for 40 – 45 min. The cake will brown up nicely. Use a toothpick or longer wooden skewer to test doneness or just touch the middle. When it is nearly firm to the touch, it is done. Let the cake cool in the pan, then remove to a cutting board or serving platter. Note that if you use the 8-inch loaf pan vs. the 9-inch, the height of the batter may result in slightly longer cooking time, so use your visual and sensory cues to know when it is done.