In medium saucepan, place oats, a pinch of salt, and 3 1/2 cups water. Bring to slight simmer, immediately turn off heat, and let oats soak overnight, covered. In the morning, stir milk into pot with oats and heat over medium-low for 10 minutes, stirring occasionally.
In separate small saucepan, heat raspberries, 2 Tbsp water, honey, and vanilla over medium heat for 5 minutes. Gently mash raspberries. Stir in chia seeds and let sit, covered, for 10 minutes.
Into cooked oats, stir protein powder and peanut butter. Stir in raspberry mixture, then place in serving bowls and top with peanuts.