In a medium saucepan, toast poppy seeds over medium heat for 2-3 minutes. Cook and stir until poppy seeds are fragrant. Add diced onion, vinegar and honey. Cook for 4-5 minutes or until onion is soft.
Transfer to a blender. (I used my Vitamix). Add remaining ingredients and blend until smooth.
Place chicken in a large zip-top bag.Add 1/3 cup of dressing and toss to coat. Refrigerate for 1 hour or up to 4 hours for marinating.
Using a griddle or grill, set the temperature to medium.
Place chicken or rack or griddle and cook for 10-12 minutes, turning once halfway through. Cook until chicken reaches 165. Place chicken on a plate. Cover with foil to keep warm.
Using a large salad bowl, arrange lettuce in the bowl. Top with strawberries, avocado slices, and red onion. Sprinkle with almonds. Serve with poppy seed dressing.